Improvement in machines foe



H.T.'ST ANARD.

Dynamome'ter.

No. 67,144.V Patented July 23, 1867.

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Letters Patent No. 67,144, dated July' 23, 18567.

l IMPROVEMENT IN MACHINES EOR APPLYING AND MEASURING FORGES.

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" TO ALL WIIOM IT MAY CONCERN:

Beit known that I, H. T. STANARD, of Wayne, in the county of Wayne, sind State of Michigan, have invented a new and useful Machine for Applying and Measuring Forces and I do hereby declare that the following is afull, clear, and exact description of thc construction and operation of the saine, reference being had to Athe annexed drawings, making a part of this specification, in which Figure l isa plan. Figure 2 is a'longitudinal-seetion. L Figure 3 is a transverse section through the measuring device.

Figure 4 is a' transverse section through the frame. Figure 5 is an isometrical view of the double lever and loops detached and enlarged. The object of this invention is to obtain a strong and cheap machine, for applying'forcc to tear asnnder an iron rod, and at the same time to measure the force in pounds,'and also to show how-much the' rod to be s tried extends under a certain amo'unt of force. The machine may bc constructed of' different sizes and capacity,

varying from a few pounds up to many thousands; its power almost beyond limit. The machine may be used l. to determine the tensile, transverse, or torsional strength, and may be used in a horizontal or perpendicular position; it can also be made portable, and used to move heavy bodies.

Description.

A is a rm foundation of timber, to which the headblocks B B are firmly secured. F F F, iigs. 1, 2,

and 4, is a frame of iron 0r other suitable material, with holes o o o constructed in three parts so that the fulcrum-pin a may have triple bearings, thereby securing greater strength; said frame is secured to head-bleek F' B by the pin I. In this frame the double lever C C, figs. 1, 2, 4, and 5, operates on the movable fulcrum-pin a.

L 8 8, fig. 5, are recesses -for bearings on the pins.A G, iig. 1, is a notched rod pivoted to the framewith the Abolt m, and engages the double lever on pin p. The hand-lever I-I is pivoted to the frame bythe bolt m', and carries the notched rod D and engages with the double lever on pin P. The loops ff, igs. 2 and 5, u'ork easily in the double-lever C C, and connected by the double draw-rod T. S is a scale of equal parts. E,'figs. 1, 2, and Y3, 'is plank or frame, pivoted to the foundation A, with a pin, X. M isa block, fast to the plank E, to which the hook L is fastened. The steelyardarm N has one of-its fulcrum bearings at d, and secured to the head-block B by the pin 2; the other fulcrum bearing is at b, in connection with hook L. The steelyardarm Ris connected to arm N by the bar S -S; it has a bearing at 1, and fixed to the plank at l. It is an indexr wheel, with bearing 9, on which the pointer 3 is firmly fixed, with its point turned upso'as to come against i. the pointer 4, which is loose on the arbor. To the wheel there are fastened two fine chains or cords 5 andvG;

the cord 5 is attached to the spring 7, and the cord 6 passes around the wheel and is fastened to the arm R. i o o aref a circular scale.

l Operation. y l The rod to be tried is to be fastenefi't-o the hook L and tl1e-rod '.L, iig. 1. 'lhe lever I-I is moved in the direction indicated by the arrow until the rod D engages Pin another notch, then apply some force te the lever H in the opposite direction, untiltlie double lever C is brought in position to engage another notch on i rod G; new the pivot-pin n must be re/moved, the double level` resting for its fulcrum dn pin a; repeat the operation of the hand lcverH and reds G and D, until the double lever C is brought in such a position as to permit the pvot-pin t'o be inserted at 1, then disengage both rods G and Dand move the double lever C in position to insert the fulcrum-pin at k; this is easily done,lfor the lever C turns on the pivot n. 'lhc operation withlevcr Histo be repeated again; during this operation the force acts upon the stcelyard arm N, and is transmitted to arm R by the bar-SS, and turns the indexwheel,` and the force in pounds is indicated by the pointer lV on the circular scale o o. When the rod breaks the index-wheel turns bacli,but the pointer l remains if on the proper number; during the operation the extension of the rod under trial can be noted on scale S.

Ido not claim separately the working of the lever in a frame on movable fulcra; neither do I claim the compound lever. I do not claim any new principle in the -steelyard arm, or-index, or the spring, separately.

What I claim as my invention, and desire to secure by Letters Patent, isr- 1. I claim the frame F F Fin triple form, as described. t

2. I claim the combination of the double lever C C, with the frame F F F, as specified, to obtain a triple bearing for the fulcrum-pin, thereby securing greater strength. t 'D 3. I claim, in combination, the arms N and R, index-wheel t, pointers 3 and 4, scale o o, chain or cord 5 and 6, spring 7, all combined and operating as specilied. n. T. STANARD Witnesses:

WILLAnD Ennemis, JOHN J, Ennemis. 

